Production of expandable beads from the thermoplastic materials

Details Production of expandable beads from the thermoplastic materials Production of expandable beads from the thermoplastic materials

1977-12-06

1978-08-08

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

526 80, E08J 920

Patent

active

041055969

ABSTRACT:
This invention relates to a process for production of expandable thermoplastic beads with improved yield and with improved expandability. The process involves maintaining the polymerization vessel full of liquid at a certain pressure or with a gradually increased outside pressure on the reaction media.

REFERENCES:
patent: 3951883 (1976-04-01), Ruchlak
patent: 3994840 (1976-11-01), Kajimura et al.
patent: 4067827 (1978-01-01), Takauo et al.

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